Low-temperature and reversible hydrogen storage advances of light metal borohydrides

Shun Wang, Zhenglong Li, Mingxia Gao, Yongfeng Liu and Hongge Pan

Renewable and Sustainable Energy Reviews, 2025, vol. 208, issue C

Abstract: Solid-state light metal borohydrides represented by LiBH4, NaBH4, Mg(BH4)2, and Ca(BH4)2 with high hydrogen capacity are promising media to store and transport hydrogen safely and efficiently, raising a hope for popularizing electricity-hydrogen coupling systems built on clean and renewable energy. Yet stable thermodynamics and sluggish kinetics of light metal borohydrides remain two key issues to be addressed for achieving the rapid and reversible hydrogen desorption and absorption under mild conditions. In this review, the short introductions for basic hydrogen storage characteristics of light metal borohydrides and fundamental principles of common thermodynamic and kinetic modification strategies are first presented. Then the focus is on the research advances in reducing operation temperature, accelerating reaction rates, and enhancing cyclic reversibility of light metal borohydrides by using these strategies or their synergy. On this basis, the existing challenges and future directions on light metal borohydrides are proposed from novel and specific perspectives, aiming to obtain high performance hydrogen storage materials practically available towards electricity-hydrogen coupling systems.

Keywords: Light metal borohydrides; Thermodynamics; Kinetics; Reversible hydrogen storage; Electricity-hydrogen coupling systems (search for similar items in EconPapers)
Date: 2025
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DOI: 10.1016/j.rser.2024.115000

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